Whichof the following phase of the writing process involves checking the content to see if the essay is sufficiently detailed and adequately supports the thesis statement?
a. drafting phase
b. revising phase
c. prewriting phase
d. editing phase

Prewriting = this is a research stage. You have to gather and select informations or ideas

drafting = in this phase you should write your ideas and develop them. 

revising - this phase of writing involves rewriting 

editing - this stage involves checking spelling, grammar, punctuation etc

So your answer  is revising phase - B

There is no text so what text is it